<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>
<body>
    <ol>
        <todo-item></todo-item>
    </ol>
    
    <script>
        Vue.component('todo-item', {
            template: '<li>这是个代办事项</li>'
        })
    </script>
</body>
</html>